“Look out, everybody, things are about to get awesome!”
Diadems are guardian enemies encountered in Takedown at the Guardian Breach. The Diadem is a slow-moving suicide-bomber type enemy. To aid them in this, they are immune to all forms of damage not dealt to their weak spot, the orb above their head. If defeated before it can manually detonate, it will also destroy all nearby Guardians.
- Main article: Takedown at the Guardian Breach (mission)